Added option to make Keystroke history follow mouse position

[elMuso]

Please ignore the multiple commits, my pc can not run visual studio so i used github actions as my compiler (-.-). I was figuring out how c# worked. and i knew nothing about windows forms when i started editing the fork

Basically this program is almost perfect for my needs except that i tought it needed the option to make the keystrokes follow the mouse position, this is because i zoom a lot in videos that i make so having the keystrokes next to the mouse would make editing almost instantaneous.

Since the images follow the mouse already i just copied some code and added a textbox for it to work.
The new option can be found under "Show keystroke history" at the keystroke history tab. Toggling it restarts the app since i couldn't figure out how to preserve and restore the static position without doing it. But it's disabled by default

Initially i was going to make it for myself but seeing how it works i think it must be on the official binary. Some cleaning may be needed

[kmpm]

The functionality is fine by me but you should perhaps do a git rebase and squash all those unnecessary commits.

[hectorC]

It would be great to have this included. This is the only function that is missing for my use case.

[luce80]

I think It would be great to have this included, too. Please make an exe with it.